Jeannine Brooke Riley was born on October 1, 1940, in Madera, California. She started her acting career in 1962 with an unbilled role in the drama film "Five Finger Exercise" and appeared in several TV shows, including "Father of the Bride," "Route 66," and "My Three Sons."
In 1963, she co-starred with Gary Clarke and Steve Ihnat in the low-budget suspense drama "Strike Me Deadly" and appeared on stage in the play "The Fourposter." She then began to gain attention for her roles in western series "Wagon Train" and "The Virginian."
Jeannine was cast as daughter Billie Jo Bradley in the TV series "Petticoat Junction" in 1963, replacing Sharon Tate who was dismissed due to her nude photo shoots. She played the role for two years before leaving the show.
After "Petticoat Junction," Jeannine continued to appear in TV guest roles and films, including "The Big Mouth" and "Electra Glide in Blue." She also appeared in several unsold pilots and TV series, including "The Smothers Brothers Show" and "Hee Haw."
Jeannine's last credits were the films "Lone Star Bar & Grill" (1983) and "Timebomb" (1991).